CN211570217U - Organic waste liquid treatment device of cylinder type DBD plasma - Google Patents
Organic waste liquid treatment device of cylinder type DBD plasma Download PDFInfo
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- CN211570217U CN211570217U CN201921865791.9U CN201921865791U CN211570217U CN 211570217 U CN211570217 U CN 211570217U CN 201921865791 U CN201921865791 U CN 201921865791U CN 211570217 U CN211570217 U CN 211570217U
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Abstract
A cylindrical DBD plasma organic waste liquid treatment device belongs to the technical field of sewage treatment. The device comprises a quartz glass medium layer and a stainless steel cylindrical high-voltage inner electrode, wherein the outer electrode is grounded by adopting a copper plate or a stainless steel net, and the flow of discharge gas is controlled by adopting a glass rotameter. Gas enters from the upper hole of the reactor and is discharged from the lower hole. The antibiotic waste liquid is circularly conveyed to the discharge area and the storage pool by the peristaltic pump. At the interface of water, air, or air and water, plasma is generated by applying high voltage breakdown at the electrodes, creating an electron avalanche effect. The electrons collide with water molecules and air molecules in the advancing process to be ionized, so that the plasma can provide electrons, ions, active free radicals, excited atoms, molecules, light, heat and other physical and chemical effects, can generate various complex physical and chemical reactions with organic antibiotics, and can synergistically act on organic antibiotic pollutants in the degradation wastewater.
Description
Technical Field
The utility model relates to a purification device and a purification method for treating antibiotic wastewater, in particular to a non-thermal plasma technology based on one of advanced oxidation technologies, which adopts a ring-cylinder type medium to block discharge to treat the purification device for antibiotic wastewater, and belongs to the technical field of sewage treatment.
Background
With the change of daily living standard and the increasing use amount of medicines for human beings and livestock, antibiotic medicines have become one of the most widely used antibacterial medicines in the world. The popularization of antibiotics brings about an increase in the level of life, with the consequent problem of pollution of the environment, in particular of water. The primary pollution sources of antibiotic pollution are domestic and hospital waste water, and the discharge of waste water in animal breeding, aquaculture and pharmaceutical industry. Since antibiotic drugs are largely unabsorbed and metabolized in the human or animal body and are usually excreted in vitro in the form of their original structure or metabolites that are still biologically active, they accumulate in the environment over time, through the ecological cycle, posing great risks to both the living species and human health. The surface water, drinking water and even seawater in the global range can detect typical broad-spectrum antibiotics, which indicates that the antibiotic pollution is serious, and meanwhile, the removal effect of the conventional process is proved to be not obvious. To improve the quality of water environment, the popularization of efficient and economic antibiotic pollution water treatment technology must be developed to research the popularization of antibiotics so as to improve the living level and simultaneously bring about the pollution problem to the environment, particularly water. Surface water, drinking water and even seawater in the global range can detect typical broad-spectrum antibiotics, and efficient and economic research on antibiotic-polluted water treatment technology is required to be developed to improve the quality of water environment.
The non-thermal plasma discharge water treatment technology is proved to be a method for effectively degrading organic pollutants in water, and is divided into water subjected to discharge treatment in gas, water subjected to discharge treatment in liquid and water subjected to bubbling discharge treatment in liquid. Wherein the water is treated by electric discharge in gas at the interface of water, air or air and water, and the plasma is generated by applying high voltage breakdown on the electrode to generate electron avalanche effect. The electrons collide with water molecules and air molecules in the advancing process to generate ionization, provide electrons, ions, active free radicals, excited atoms and molecules, and physical and chemical effects such as light, heat and the like, can generate various complex physical and chemical reactions with organic antibiotics, and synergistically act on organic antibiotic pollutants in the degradation wastewater. The method has the characteristics of simple equipment, low discharge voltage, more types of available ions, more discharge modes and the like.
Dielectric Barrier Discharge (DBD) refers to the generation of non-equilibrium gas discharge by covering an insulating Dielectric layer on the surface of an electrode. The insulating medium used is mainly quartz glass, ceramic or polymer, etc. The dielectric barrier discharge is divided into two forms of a flat plate structure and a coaxial structure according to the electrode structure. In the existing DBD plasma water treatment, the electrode structure mainly adopted is: needles, wires, rod-plate and ring-cylinder, etc., which generate a sufficiently high local electric field strength to excite and ionize the material molecules around the electrodes, generating plasma-degradable radicals. When the ring-cylinder type electrode is adopted, not only can the effective discharge area and the gas-liquid contact area be increased, but also the large-area gas-liquid contact can provide more active particles, so that the treatment efficiency is improved, and the treatment of large-area industrial-grade organic antibiotic wastewater is possible to realize. The plasma processing device can form large-area uniform discharge, has simple equipment and devices, is easy to operate and control, is beneficial to full contact of plasma and a processed object, can prevent local spark or arc discharge from forming due to the existence of the dielectric layer, ensures the safe and stable operation of the device, integrates the advantages of a plurality of discharge modes, can easily generate non-equilibrium plasma, and has moderate temperature and density of the plasma, thus being widely applied.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a ring-section of thick bamboo structure's dielectric barrier discharge plasma water treatment facilities can realize great volumetric treatment capacity, researches DBD plasma to the treatment effect of antibiotic. Through optimization and improvement of the key structure of the plasma reactor, the device has the advantages of simple structure, convenience in operation, high degradation efficiency, low energy consumption, long service life, no secondary pollution and the like, so that the research result provides scientific basis for realizing treatment of large-area and industrial-grade organic antibiotic wastewater and protecting aquatic ecological environment.
The utility model discloses a realize through following technical scheme.
A purification device for treating refractory wastewater is characterized by comprising a plasma reactor (1) with a ring-cylinder structure, a liquid storage pool (2) to be detected, a peristaltic pump (3), a cylinder (4) and a controller (5);
the plasma reactor (1) with the ring-cylinder structure comprises an inner cylinder (11) and an outer cylinder (12), wherein the outer cylinder (12) is nested outside the inner cylinder (11), an annular gap (13) is arranged between the inner cylinder and the outer cylinder, the upper end of the annular gap (13) is respectively provided with an air inlet (14) and a liquid inlet (15), the bottom of the plasma reactor (1) is communicated with the annular gap (13) and is provided with an outlet (16), the inner cylinder (11) is used as a high-voltage electrode of the plasma reactor (1) and is connected with a high-voltage power supply, the outer cylinder (12) is made of quartz materials as a medium, and the outer periphery of the outer cylinder (12) is provided with a grounding electrode (;
an air inlet (14) of the plasma reactor (1) with a ring-cylinder structure is connected with an air cylinder (4), and a control valve is arranged on the air cylinder (4); the liquid inlet (15) is connected with the liquid in the liquid storage pool (2) to be detected through the peristaltic pump (3), and the outlet (16) is connected with the liquid storage pool (2) to be detected to form a circulation loop; the liquid storage pool (2) to be tested is provided with an air outlet and a water outlet; the pipeline through which the liquid flows is a water path system, and the pipeline through which the gas flows is a gas path system;
meanwhile, the grounding electrode (17) is connected with a current probe of the controller (5) for controlling current, the inner cylinder (11) is used as a high-voltage electrode and connected with a voltage probe of the controller (5) for controlling voltage, and the controller (5) is connected with a power supply.
The gas inlet and the liquid inlet of the plasma reactor (1) adopt polytetrafluoroethylene connectors; the gas of the gas inlet and the liquid of the liquid inlet form the same path in the annular gap (13); and gas and liquid discharged from an outlet at the lower part of the plasma reactor enter a water storage tank, the gas in the water storage tank is discharged from an exhaust port, and the liquid is discharged from a water discharge port or enters the plasma reactor (1) again through a peristaltic pump for circulation.
In the technical scheme, the liquid in the liquid inlet flows through the surface of the high-voltage electrode from top to bottom.
In the above technical scheme, the power supply is a high-voltage pulse power supply or/and an alternating current power supply.
In the technical scheme, the plasma reactor high-voltage electrode and the grounding electrode are respectively arranged on the inner side and the outer side of the plasma reactor medium quartz tube and are coaxially arranged.
In the technical scheme, the upper part of the plasma reactor is fixed and spaced by adopting a polytetrafluoroethylene material, so that the formation of arc discharge is prevented.
In the technical scheme, the reactor is internally provided with a stainless steel high-voltage electrode tube, and the external grounding electrode is a copper or stainless steel net.
In the technical scheme, a peristaltic pump is used for supplying liquid, and a liquid inlet (15) is arranged to enable the liquid to form an even water film on the surface of the electrode.
A purification method for treating antibiotics in water by adopting the device, which comprises the following steps: introducing wastewater containing antibiotic organic pollutants into a water storage tank, allowing the wastewater to enter a plasma reactor, uniformly flowing along a liquid inlet, and setting the flow rate to be 0-1000 mL/min; introducing air/argon into the gas path system, namely introducing the air/argon into the plasma reactor through the cylinder (4), and setting the flow rate to be 1-5L/min; starting the controller to form dielectric barrier discharge between a high-voltage electrode and a grounding electrode of the plasma reactor, applying high-voltage breakdown on the electrode at the interface of water, air or air and water to generate an electron avalanche effect to generate plasma, wherein electrons collide with water molecules and air molecules in the advancing process to generate ionization, so that the plasma can provide strong oxidizing active particles including high-energy electrons and hydroxyl free radicals, and the physicochemical effects of excitation light, heat and the like can generate various complex physicochemical reactions with organic antibiotics to synergistically act on organic antibiotic pollutants in the wastewater to degrade the wastewater, thereby purifying the wastewater.
The plasma reactor is provided with a waterway system as a circulating system, purified wastewater circularly enters the reactor from a water outlet through a waterway pipeline, and forms dielectric barrier discharge between a high-voltage electrode and a grounding electrode, and high-voltage breakdown is applied to the electrode at the interface of water, air or air and water to generate an electron avalanche effect to generate plasma. The electrons collide with water molecules and air molecules in the advancing process to be ionized, so that the plasma can provide strong oxidizing active particles including high-energy electrons and hydroxyl free radicals, and the exciting light, the heat and other physical and chemical effects can generate various complex physical and chemical reactions with organic antibiotics to synergistically act on organic antibiotic pollutants in the degraded wastewater to purify the wastewater.
After the gas circuit and the water circuit system are stabilized, a high-voltage power supply is started, dielectric barrier discharge is formed between a plasma high-voltage electrode and a grounding electrode, and high-voltage breakdown is applied to the electrode at the interface of water, air or air and water to generate an electron avalanche effect to generate plasma. Electrons collide with water molecules and air molecules in the advancing process to be ionized, so that the plasma can provide strong oxidizing active particles including high-energy electrons and hydroxyl free radicals, and the exciting light, the heat and other physical and chemical effects can generate various complex physical and chemical reactions with organic antibiotics to synergistically act on organic antibiotic pollutants in the degraded wastewater to purify the wastewater.
The purified wastewater circularly enters the reactor again from the water outlet through the waterway pipeline.
The utility model has the following outstanding advantages and effects: the device structure adopts a coaxial-cylinder type atmospheric pressure DBD reactor, the effective discharge area of the reactor is large, tetracycline simulation wastewater with large flow can be efficiently degraded, compared with the previous similar plasma degradation experimental researches, the volume of the treated wastewater is increased, and the treated wastewater has a large contact surface with a circulating descending water film, so that the good transfer of oxidizing species from a gas phase to a liquid phase is facilitated; the device has the advantages of small occupied area, capability of being used immediately after stopping, convenient operation, stable operation, high treatment efficiency, low energy consumption, no secondary pollution and the like.
Drawings
FIG. 1 is a schematic structural view of a purification apparatus for treating refractory wastewater.
The device comprises a plasma reactor 1, a to-be-detected liquid storage pool 2, a peristaltic pump 3, a cylinder 4, a controller 5, an inner cylinder 11, an outer cylinder 12, an annular gap 13, an air inlet 14, a liquid inlet 15, an outlet 16 and a grounding electrode 17.
Detailed Description
The following describes the embodiments and working processes of the present invention with reference to the accompanying drawings. However, the present invention is not limited to the following examples.
The terms of orientation such as up, down, left, right, front, and rear in the present specification are established based on the positional relationship shown in the drawings. The corresponding positional relationship may also vary depending on the drawings, and therefore, should not be construed as limiting the scope of protection.
Example 1
The utility model provides a handle purifier of antibiotic waste water, the concrete structure is shown in figure 1, is based on the non-thermal plasma technique as one of advanced oxidation technology, and high energy electron, ion, active free radical, excitation atom and molecule etc. through discharge formation participate in chemical effect, produce physical effects such as light, heat, electricity simultaneously, and the plasma reactor of antibiotic in the combined action degradation waste water.
A purification device for treating antibiotic wastewater comprises a plasma reactor, a water path and gas path system, a power supply and a parameter testing system, wherein the water path and gas path system, the power supply and the parameter testing system are connected with the plasma reactor.
As shown in fig. 1, the plasma reactor comprises an inner high voltage electrode, a quartz tube, and an outer ground electrode, which are arranged from inside to outside in the plasma reactor.
The plasma reactor also includes a teflon fitting in the upper portion of the apparatus. And an air inlet and a water inlet are arranged, gas is introduced into the plasma reactor through an air pipe by a flowmeter, and aqueous solution is introduced into the plasma reactor through a water pipe by a peristaltic pump, which can be understood by a person skilled in the art.
The plasma reactor regulates the gas and water flow rates depending on the concentration of the antibiotic solution and the ease of degradation, as will be appreciated by those of ordinary skill in the art.
The power supply of the plasma reactor comprises a pulse high-voltage power supply and an alternating current power supply, the starting modes are slightly different, after the gas circuit and the water circuit system stably run, the power supply is started, dielectric barrier discharge is formed between a high-voltage electrode and a grounding electrode, and high-voltage breakdown is applied to the electrode at the interface of water, air or air and water to generate an electron avalanche effect to generate plasma. Electrons collide with water molecules and air molecules in the advancing process to be ionized, so that the plasma can provide strong oxidizing active particles including high-energy electrons and hydroxyl free radicals, and the exciting light, the heat and other physical and chemical effects can generate various complex physical and chemical reactions with organic antibiotics to synergistically act on organic antibiotic pollutants in the degraded wastewater to purify the wastewater.
In the operation process of the plasma reactor, voltage is measured by a high-voltage probe, current is measured by a current probe, voltage and current changes are monitored by an oscilloscope, and effective discharge power is calculated.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A cylindrical DBD plasma organic waste liquid treatment device is characterized by comprising a plasma reactor (1) with a ring-cylinder structure, a liquid storage pool (2) to be detected, a peristaltic pump (3), an air cylinder (4) and a controller (5);
the plasma reactor (1) with the ring-cylinder structure comprises an inner cylinder (11) and an outer cylinder (12), wherein the outer cylinder (12) is nested outside the inner cylinder (11), an annular gap (13) is arranged between the inner cylinder and the outer cylinder, the upper end of the annular gap (13) is respectively provided with an air inlet (14) and a liquid inlet (15), the bottom of the plasma reactor (1) is communicated with the annular gap (13) and is provided with an outlet (16), the inner cylinder (11) is used as a high-voltage electrode of the plasma reactor (1) and is connected with a high-voltage power supply, the outer cylinder (12) is made of quartz materials as a medium, and the outer periphery of the outer cylinder (12) is provided with a grounding electrode (;
an air inlet (14) of the plasma reactor (1) with a ring-cylinder structure is connected with an air cylinder (4), and a control valve is arranged on the air cylinder (4); the liquid inlet (15) is connected with the liquid in the liquid storage pool (2) to be detected through the peristaltic pump (3), and the outlet (16) is connected with the liquid storage pool (2) to be detected to form a circulation loop; the liquid storage pool (2) to be tested is provided with an air outlet and a water outlet; the pipeline through which the liquid flows is a water path system, and the pipeline through which the gas flows is a gas path system;
meanwhile, the grounding electrode (17) is connected with a current probe of the controller (5) for controlling current, the inner cylinder (11) is used as a high-voltage electrode and connected with a voltage probe of the controller (5) for controlling voltage, and the controller (5) is connected with a power supply.
2. The cylindrical DBD plasma organic waste liquid treatment device as claimed in claim 1, wherein a polytetrafluoroethylene joint is adopted for a gas inlet and a liquid inlet of the plasma reactor (1); the gas of the gas inlet and the liquid of the liquid inlet form the same path in the annular gap (13); and gas and liquid discharged from an outlet at the lower part of the plasma reactor enter a water storage tank, the gas in the water storage tank is discharged from an exhaust port, and the liquid is discharged from a water discharge port or enters the plasma reactor (1) again through a peristaltic pump for circulation.
3. The cylindrical DBD plasma organic waste liquid treatment device as claimed in claim 1, wherein the liquid in the liquid inlet flows through the surface of the high voltage electrode from top to bottom.
4. The cylindrical DBD plasma organic waste liquid treatment device as claimed in claim 1, wherein the power supply is a high voltage pulse power supply or/and an alternating current power supply.
5. The cylindrical DBD plasma organic waste liquid treatment device as claimed in claim 1, wherein the plasma reactor high voltage electrode and the grounding electrode are respectively arranged on the inner side and the outer side of the plasma reactor medium quartz tube and are coaxially arranged.
6. The apparatus for treating a cylindrical DBD plasma organic waste liquid according to claim 1, wherein the upper part of the plasma reactor is made of polytetrafluoroethylene for fixing and spacing the parts so as to prevent the formation of arc discharge.
7. The cylindrical DBD plasma organic waste liquid treatment device as claimed in claim 1, wherein the inside of the reactor is a stainless steel high voltage electrode tube, and the outside grounding electrode is a copper or stainless steel mesh.
8. The cylindrical DBD plasma organic waste liquid treatment device as claimed in claim 1, wherein a peristaltic pump is selected for liquid supply, and the liquid inlet (15) is arranged to enable liquid to form a uniform water film on the surface of the electrode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921865791.9U CN211570217U (en) | 2019-10-31 | 2019-10-31 | Organic waste liquid treatment device of cylinder type DBD plasma |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921865791.9U CN211570217U (en) | 2019-10-31 | 2019-10-31 | Organic waste liquid treatment device of cylinder type DBD plasma |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112374587A (en) * | 2020-11-05 | 2021-02-19 | 南京林业大学 | Plasma processing system and method for synchronously removing organic matters and heavy metals |
| CN115432767A (en) * | 2022-08-09 | 2022-12-06 | 上海翰逸环保科技有限公司 | Cutting fluid device is handled to high-pressure alternating current electric arc plasma |
| CN115571952A (en) * | 2022-09-27 | 2023-01-06 | 合肥学院 | Tetracycline degradation method and degradation device thereof |
| CN116963847A (en) * | 2021-12-30 | 2023-10-27 | 米凯·亚历山大维奇·米山尼诺夫 | Reactor of waste treatment device |
| CN117865274A (en) * | 2024-03-07 | 2024-04-12 | 中科华鹿(合肥)环保科技有限公司 | Sewage treatment pipeline capable of decomposing antibiotics based on plasmas |
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2019
- 2019-10-31 CN CN201921865791.9U patent/CN211570217U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112374587A (en) * | 2020-11-05 | 2021-02-19 | 南京林业大学 | Plasma processing system and method for synchronously removing organic matters and heavy metals |
| CN116963847A (en) * | 2021-12-30 | 2023-10-27 | 米凯·亚历山大维奇·米山尼诺夫 | Reactor of waste treatment device |
| CN115432767A (en) * | 2022-08-09 | 2022-12-06 | 上海翰逸环保科技有限公司 | Cutting fluid device is handled to high-pressure alternating current electric arc plasma |
| CN115432767B (en) * | 2022-08-09 | 2023-12-05 | 上海翰逸环保科技有限公司 | High-voltage alternating-current arc plasma cutting fluid treatment device |
| CN115571952A (en) * | 2022-09-27 | 2023-01-06 | 合肥学院 | Tetracycline degradation method and degradation device thereof |
| CN117865274A (en) * | 2024-03-07 | 2024-04-12 | 中科华鹿(合肥)环保科技有限公司 | Sewage treatment pipeline capable of decomposing antibiotics based on plasmas |
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